Answer:
22.29% probability that both of them scored above a 1520
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:

The first step to solve the question is find the probability that a student has of scoring above 1520, which is 1 subtracted by the pvalue of Z when X = 1520.
So



has a pvalue of 0.5279
1 - 0.5279 = 0.4721
Each students has a 0.4721 probability of scoring above 1520.
What is the probability that both of them scored above a 1520?
Each students has a 0.4721 probability of scoring above 1520. So

22.29% probability that both of them scored above a 1520
Answer:
The net sales for last month were <u>$19,525</u>.
Step-by-step explanation:
Given:
Last month sales were $24,000.
Discounts is $3,500 and $975 in returns.
Now, to get the net sales for last month.
So, we deduct the discount:
<em>Sales - discounts</em> = 
Then, we deduct the returns from the remaining amount:
<em>Sales after discounts - returns</em> = 
= 
Therefore, the net sales for last month were $19,525.
X=2
Explanation:
You need to find the midpoint of the segment
-2+6=4
4/2=2
I think the answer is negative 8 square root 726
then the answer if I am right sorry if I am not would be negative 88 square root 6
again sorry if wrong